Multiaxial fatigue assessment using a simplified critical plane-based criterion

Uniaxial, torsion, and axial-torsion fatigue experiments were conducted on a pressure vessel steel, 16MnR, in ambient air. The uniaxial experiments were conducted using solid cylindrical specimens. Axial-torsion experiments employed thin-walled tubular specimens subjected to proportional and nonproportional loading. The true fracture stress and strain were obtained by testing solid shafts under monotonic torsion. Experimental results reveal that the material under investigation does not display significant nonproportional hardening. The material was found to display shear cracking under pure shear loading but tensile cracking under tension-compression loading. Two critical plane multiaxial fatigue criteria, namely, the Fatemi–Socie criterion and the Jiang criterion, were evaluated based on the experimental results. The Fatemi–Socie criterion combines the maximum shear strain amplitude with a consideration of the normal stress on the critical plane. The Jiang criterion makes use of the plastic strain energy on a material plane as the major contributor to the fatigue damage. Both criteria were found to correlate well with the experiments in terms of fatigue life. The predicted cracking directions by the criteria were less satisfactory when comparing with the experimentally observed cracking behavior under different loading conditions.

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A Virtual-Strain-Energy-Density-Based Critical-Plane Criterion to Multiaxial Fatigue Life Prediction

Journal of Materials Engineering and Performance ◽

10.1007/s11665-020-04919-2 ◽

2020 ◽

Vol 29 (6) ◽

pp. 3913-3920

Author(s):

Jing Li ◽

Yuan-ying Qiu ◽

Xiao-long Tong ◽

Lei Gao

Keyword(s):

Fatigue Life ◽

Energy Density ◽

Strain Energy Density ◽

Strain Energy ◽

Life Prediction ◽

Multiaxial Fatigue ◽

Fatigue Life Prediction ◽

Critical Plane ◽

Virtual Strain Energy Density

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Multiaxial fatigue assessment of jacket-supported offshore wind turbines considering multiple random correlated loads

Renewable Energy ◽

10.1016/j.renene.2021.01.093 ◽

2021 ◽

Vol 169 ◽

pp. 1252-1264

Author(s):

Chaoshuai Han ◽

Kun Liu ◽

Yongliang Ma ◽

Peijiang Qin ◽

Tao Zou

Keyword(s):

Wind Turbines ◽

Multiaxial Fatigue ◽

Offshore Wind ◽

Fatigue Assessment ◽

Offshore Wind Turbines

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Multiaxial fatigue life evaluation using strain energy-based critical plane approach

Procedia Structural Integrity ◽

10.1016/j.prostr.2020.01.011 ◽

2019 ◽

Vol 22 ◽

pp. 78-83

Author(s):

Meng-Fei Hao ◽

Shun-Peng Zhu ◽

Fu-Long Xia

Keyword(s):

Fatigue Life ◽

Strain Energy ◽

Multiaxial Fatigue ◽

Critical Plane ◽

Life Evaluation ◽

Critical Plane Approach ◽

Fatigue Life Evaluation

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An Experimental Evaluation for Four Multiaxial Fatigue Approaches

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.627.425 ◽

2014 ◽

Vol 627 ◽

pp. 425-428

Author(s):

Dan Jin ◽

Da Jiang Tian ◽

Qi Zhou Wu ◽

Wei Lin

Keyword(s):

Low Cycle Fatigue ◽

Multiaxial Fatigue ◽

304 Stainless Steel ◽

Normal Strain ◽

Cycle Fatigue ◽

Critical Plane ◽

Maximum Shear Strain ◽

Rainflow Cycle Counting ◽

Tubular Specimens ◽

Damage Rule

A series of tests for low cycle fatigue were conducted on the tubular specimens for 304 stainless steel under variable amplitude and irregular axial-torsional loading. Rainflow cycle counting and linear damage rule are used to calculate fatigue damage and four approaches, e.g. SWT(Smith-Watson-Topper), KBM(Kandil-Brown-Miller), FS(Fatemi-Socie), and LKN(Lee-Kim-Nam) approach are employed to predict the fatigue life. The maximum shear strain plane, the maximum normal strain plane, and the maximum damage plane are considered as the critical plane, respectively. The effects of the choice of the critical plane on previous approaches are discussed. It is shown that comparing with the maximum shear/normal strain approach, the predictions are improved by using the maximum damage plane approach, part nonproportional paths for SWT, AV and part nonproportional paths for KBM, TV paths for FS. But for LKN, the prediction results are nonconservative for some paths than that of the maximum shear/normal strain approach.

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